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Natural Bridges National Monument, located on the Colorado Plateau in the sparsely populated southeastern corner of Utah, is famous for the second-largest natural bridge in the world. It is also notable for its almost perfect lack of light pollution. This advantage of location makes it among the darkest National Park Service units in the lower 48 U.S. states. Becoming an IDA Dark Sky Park challenged Natural Bridges to minimize its own nocturnal impact and share its magnificent starry sky with the park’s 95,000 annual visitors. During the summer, the park provides astronomy ranger programs under spectacular starry skies.